(A) The ancient Olympic games were held every four years, a period of time known as an Olympiad;
usage of an Olympiad as a unit of time in ancient histories is sometimes credited to Eratosthenes, who was chief librarian at the Library of Alexandria and is known for his calculation of the circumference of the Earth and for the Earth’s axial tilt as well as for his introduction of the sieve of Eratosthenes, an ancient algorithm for finding prime numbers. - Incorrect placement of modifier, Eliminate
(B) The ancient Olympic games were held every four years, a period of time known as an Olympiad;
the use of an Olympiad as a unit of time in ancient histories is sometimes credited to Eratosthenes, who was chief librarian at the Library of Alexandria and is known for his calculation of the circumference of the Earth and the Earth’s axial tilt as well as for his introduction of the sieve of Eratosthenes, an ancient algorithm for finding prime numbers. - Correct placement of modifer, Correct
(C) The ancient Olympic games were held every four years, a period of time known as an Olympiad;
the use of an Olympiad as a unit of time in ancient histories is sometimes credited to Eratosthenes, chief librarian at the Library of Alexandria, known for his calculation of the circumference of the Earth and of the Earth’s axial tilt as well as for his introduction of the sieve of Eratosthenes, an ancient algorithm for finding prime numbers. - Incorrect grammar, Eliminate
(D) The ancient Olympic games were held every four years, a period of time known as an Olympiad;
usage of an Olympiad as a unit of time in ancient histories is sometimes credited to Eratosthenes, who was chief librarian at the Library of Alexandria and known for his calculation of the circumference of the Earth and the Earth’s axial tilt as well as for his introduction of the sieve of Eratosthenes, an ancient algorithm for finding prime numbers. - 'is known' is required, Eliminate
(E) The ancient Olympic games were held every four years, a period of time known as an Olympiad;
the use of an Olympiad as a unit of time in ancient histories is sometimes credited to Eratosthenes, who was chief librarian at the Library of Alexandria and is known for his calculation of the circumference of the Earth and for the Earth’s axial tilt as well as for his introduction of the sieve of Eratosthenes, an ancient algorithm for finding prime numbers. - Incorrect placement of modifier, (should be calculation of Earth's axial tilt), Eliminate
Ans : B